CN205050692U - Distribution transformer on post with built -in protect function - Google Patents
Distribution transformer on post with built -in protect function Download PDFInfo
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- CN205050692U CN205050692U CN201520815403.1U CN201520815403U CN205050692U CN 205050692 U CN205050692 U CN 205050692U CN 201520815403 U CN201520815403 U CN 201520815403U CN 205050692 U CN205050692 U CN 205050692U
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- transformer
- post
- cut
- distribution transformer
- offfing
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Abstract
The utility model provides a distribution transformer on post with built -in protect function, includes high -pressure inlet wire, oil tank and high voltage winding, is provided with backup fuse and three -phase magnetism in the oil tank and keeps cut -offfing the ware, and backup fuse keeps cut -offfing ware lug connection with the insulation support and the three -phase magnetism of high -pressure inlet wire respectively, and three -phase magnetism keeps cut -offfing the ware and is connected with high voltage winding. Three -phase magnetism keeps cut -offfing the ware and sets up in the medial surface of oil tank, and its position is higher than distribution transformer's iron core top yoke's on the post top. This transformer has been realized the protection of two segmentations, the too high protection of oil temperature, the oil level of overload and trouble and has been crossed the manual combined floodgate function of low shutting, has been divided disconnected / functions such as closed load current, need not change equipment during overload protection, repeatedly usable resumes the power supply soon, and administrative cost is low, avoid the transformer to lack and moved mutually, reduced the transformer fault rate, enhancing power supply reliability, area load switching transformer can be realized, the power that once inclines is used for keeping apart, can effectively avoid preventing the too high trouble that arouses of oil temperature in the operation of the oily warm purgation of height.
Description
Technical field
The utility model relates to one and has overload, high oil temperature protection, and distribution transformer on the post of oil level too low locking closing by hand function, belongs to distribution transformer technical field.
Background technology
Distribution transformer adopt external high pressure side to install additional traditional protection mode that fuse switch and low-pressure side install circuit breaker additional on common post; this protected mode can affect by external environment condition and human factor; the reliability protected is caused to reduce; when high oil temperature in transformer and pasta decline; all can not get protection; the probability causing transformer to break down strengthens, and power supply quality and reliability can not be guaranteed.In addition, this traditional protection mode only adopts phase-splitting to excise fault, easily causes Transformer Phase-deficient Operation; Need after high voltage drop-out type fuse cutout action to change fuse, complicated operation, restore electricity slow, management cost rises.
Summary of the invention
The deficiency that the utility model exists for distribution transformer resist technology on existing post, proposes distribution transformer on a kind of protective value is good, reliability the is high post with built-in defencive function.
Distribution transformer on the post with built-in defencive function of the present utility model, by the following technical solutions:
This transformer, comprise high pressure inlet wire, fuel tank and high pressure winding, be provided with backup fuse and three-phase magnetic in fuel tank and keep cut-off device, backup fuse keeps cut-off device to be directly connected with the insulating sleeve of high pressure inlet wire and three-phase magnetic respectively, three-phase magnetic maintenance cut-off device and high pressure winding switching.
Described three-phase magnetic keeps cut-off device to be arranged at the medial surface of fuel tank, and its position is higher than the top of yoke on the iron core of distribution transformer on post.On iron core, yoke top oil is oil temperature peak in fuel tank, oil temperature hottest point accurately can be delivered to three-phase magnetic and keep cut-off device.
The utility model achieve transformer overload and fault two-part protection, high oil temperature protection, the too low locking of oil level divides the function such as/closing function, disjunction/closed load electric current; Compared with traditional protection scheme, tool has the following advantages:
1. during overload protection (magnetic keeps cut-off device action), do not need more exchange device, reusable, after getting rid of abnormal condition load or fault, can directly again close, restore electricity fast, management cost is low.
2. three-phase magnetic keeps cut-off device action to be that single-phase induction and three-phase are threaded off, and avoids Transformer Phase-deficient Operation, reduces transformer fault rate, improve power supply reliability.
3. keep cut-off device deciliter by three-phase magnetic, realize on-load switching transformer.
4. can cut-off device be kept as isolating switch three-phase magnetic, be used for isolating transformer primary side power supply.
5. transformer effectively can be avoided to run under high oil temperature, prevent high oil temperature from causing transformer fault.
6., when oil level is too low, three-phase magnetic keeps cut-off device locking closing by hand function.
Accompanying drawing explanation
Fig. 1 is the principle schematic of distribution transformer protection on the utility model post.
Fig. 2 is the setting position schematic diagram that three-phase magnetic keeps cut-off device.
Fig. 3 is the surface structure schematic diagram that three-phase magnetic keeps cut-off device.
Fig. 4 is the principle schematic that three-phase magnetic keeps cut-off device.
Fig. 5 is the time-current chracteristic curve chart of distribution transformer protection on the utility model post.
In figure: 1, backup fuse, 2, three-phase magnetic keeps cut-off device, 3, high pressure winding, 4, yoke on iron core, 5, cut-off device oil float.
Embodiment
Distribution transformer on the post with built-in defencive function of the present utility model, the same with distribution transformer on existing post, also comprise yoke 4 on high pressure inlet wire, fuel tank, high pressure winding 3 and iron core.Its protection adopts the mode arranging high pressure backup fuse 1 and three-phase magnetic maintenance cut-off device 2 in fuel tank; as shown in Figure 1; backup fuse 1 keeps cut-off device 2 to be directly connected with the insulating sleeve of high pressure inlet wire and three-phase magnetic respectively, and three-phase magnetic keeps cut-off device 2 to be connected with high pressure winding 3 again.
Three-phase magnetic keeps cut-off device 2 to be arranged at the fuel tank medial surface of distribution transformer on post, and as shown in Figure 2, its position is higher than the top of yoke 4 on the iron core of distribution transformer on post.On iron core, yoke 4 top oil is oil temperature peak in fuel tank, oil temperature hottest point accurately can be delivered to three-phase magnetic and keep cut-off device 2.
As shown in Figure 3, three-phase magnetic keeps oil float 5 of cut-off device 2 to detect that transformer oil level is too low, by the locking of closing by hand function, avoids power transformer product to close a floodgate under low oil level state, improves the reliability that product puts into operation.
As shown in Figure 4, three-phase magnetic keeps the action of cut-off device 2 to be that single-phase induction and three-phase are threaded off, and avoids Transformer Phase-deficient Operation, reduces transformer fault rate, improve power supply reliability.
Three-phase magnetic keeps cut-off device 2 to have temperature and electric current dual factors sensitiveness; when overload or fault; big current flows through the transducer of cut-off device; the temperature of the metal material of transducer is caused to raise; when " loss of excitation " that reach transducer metal material is put, cut-off device 2 can be threaded off instantaneously, and is driven the moving contact separating brake be connected with transformer frequency response side by operating mechanism; smooth disconnection transformer frequency response, realizes high oil temperature defencive function.
When three-phase magnetic keeps the temperature of cut-off device 2 to put lower than " loss of excitation ", again can close, not need more exchange device, reusable.Available action handle keeps cut-off device 2 to carry out deciliter to three-phase magnetic, thus realizes the function of on-load switch.Three-phase magnetic keeps the operating grip of cut-off device 2 to have deciliter position instruction and reflecting at night design, can be used as isolating switch and uses.
According to the time-current chracteristic curve that Fig. 4 provides, illustrate that on the utility model post, distribution transformer achieves the two-part protection of overload and fault.
Claims (2)
1. distribution transformer on a post with built-in defencive function; comprise high pressure inlet wire, fuel tank and high pressure winding; it is characterized in that; backup fuse and three-phase magnetic maintenance cut-off device is provided with in fuel tank; backup fuse keeps cut-off device to be directly connected with the insulating sleeve of high pressure inlet wire and three-phase magnetic respectively, and three-phase magnetic keeps cut-off device and high pressure winding switching.
2. distribution transformer on the post with built-in defencive function according to claim 1, is characterized in that, described three-phase magnetic keeps cut-off device to be arranged at the medial surface of fuel tank, and its position is higher than the top of yoke on the iron core of distribution transformer on post.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520815403.1U CN205050692U (en) | 2015-10-20 | 2015-10-20 | Distribution transformer on post with built -in protect function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520815403.1U CN205050692U (en) | 2015-10-20 | 2015-10-20 | Distribution transformer on post with built -in protect function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205050692U true CN205050692U (en) | 2016-02-24 |
Family
ID=55344243
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520815403.1U Expired - Fee Related CN205050692U (en) | 2015-10-20 | 2015-10-20 | Distribution transformer on post with built -in protect function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205050692U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105206400A (en) * | 2015-10-20 | 2015-12-30 | 国网北京市电力公司电力科学研究院 | On-pillar distribution transformer with internal protection function |
-
2015
- 2015-10-20 CN CN201520815403.1U patent/CN205050692U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105206400A (en) * | 2015-10-20 | 2015-12-30 | 国网北京市电力公司电力科学研究院 | On-pillar distribution transformer with internal protection function |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160224 Termination date: 20201020 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |